Answer: Emily is in a state of IDENTITY ACHIEVEMENT
Explanation: James Marcia a Clinical and Development Psychologist explains that Identity achievement occurs in the life of an individual when an individual has done self exploration and exploration of all options available to them in order to reach a true sense of self.
This is exactly the case with Emily, after thorough consideration of what major to choose, she finally feels she has made the right decision. This is exactly what identity achievement explains.